A, refers to different
1, resistance: is a physical quantity, in physics, indicates the size of the conductor to the current obstruction.
2. Capacitance: is a component that stores electricity and electrical energy (potential energy).
Second, the role of different
1, resistance: the size of the resistance can be used to measure the conductor to the current blocking effect of the strength of the conductor, that is, the conductivity of the good and bad. The amount of resistance is related to the conductor's material, shape, volume and the surrounding environment and other factors.
2, capacitance: in the capacitive coupling amplifier and other capacitive coupling circuitry in the use of such capacitive circuitry, the isolation of direct current AC role. In the power supply filter and a variety of filter circuits in the use of this capacitor circuit, filter capacitance will be a certain frequency band of signals from the total signal removal.
Three, the principle of different
1, resistance: resistance is a characteristic of the conductor itself. Resistance will lead to changes in the flow of electrons, the smaller the resistance, the greater the flow of electrons, and vice versa. Superconductors, on the other hand, have no resistance.
2, capacitance: is composed of two ends of the pole plate and the middle of the insulating dielectric (including air). When energized, the pole plates are charged, creating a voltage (potential difference), but because of the insulating substance in the middle, the entire capacitor is non-conductive.
Baidu Encyclopedia - Capacitance
Baidu Encyclopedia - Resistance